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  • Sailboat Guide

Clipper Marine 21

Clipper Marine 21 is a 20 ′ 10 ″ / 6.4 m monohull sailboat designed by William Crealock and built by Clipper Marine between 1971 and 1977.

Drawing of Clipper Marine 21

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

  • SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
  • D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  • D: Displacement of the boat in pounds.
  • LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

  • D: Displacement of the boat in pounds
  • LOA: Length overall in feet
  • Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

A flush deck version was also available. Originally sold as CLIPPER MK 21.

Masthead rig: I: 24.4’ J: 8.85’ P: 21.33’ E: 9.0’

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Did Clipper Marine make a quality sailboat?

  • Thread starter Tim
  • Start date Apr 17, 2004
  • Forums for All Owners
  • Ask All Sailors

I'm thinking of buying a 1983 21' Clipper Marine sailboat but am unable to get much feedback on the quality of construction. I enjoy restoring sailboats but I do not want to start with junk. Any advice? Thanks, Tim  

Rick D

Low Cost/No Frills A popular entry-level boat of the 70's/early 80's. The 21 was the more popular. They also made a 26 and even a 30. All were swing keel, altho some of the 26's and 30's had a fixed keel option. They also made a quarter-tonner during the IOR days. As to quality, probably similar to the Ventures of the era. Rick D.  

Warren Renninger

Blister problems Neighbor had a 26, sailed nicely but very bad blister problems. Check carefully.  

Dan McGuire

Most have Blister Problems I have owned three boats from the 70s and 80s (MacGregors and Gulf Coast). They all had blister problems. It appears to be common with boats from that era.  

been there I just gave a clipper 21 away two years ago after owning it for three. The boat was picked up from an older gentleman who hadn't touched or bothered to keep the water out for more than ten years. The boats are famous for the forward bulkheads getting full of water and rotting out as well as the swing keel coming down too fast and causing damage forward of the keel pocket. I did have some fun sailing it on Long Island sound but certainly not a heavy duty boat. I knew the boat intimately because of the major bulkhead renovation so feel free to give me shout if you have any questions. There is clipper marine site if you haven't checked it out. Paul  

Tom s/v GAIA

We had a 23' Clipper Marine It was / is a good strong boat, fun to sail but, not very fast. For my $$ the company made a good product. Tom s/v GAIA  

I can't give mine away. I have a 74' CM 21 that I would love to get rid of. It's old, it shows it's age, needs some work, but it does float. Any interested parties may e-mail me at [email protected]  

I,ve owned both I still own my 1970 Clipper Mk 21. I also owned a Macgregor 25 swing keel for a while. Sold the Mac after a year or so only because I got a nice price on a bigger boat. The Clipper has a slightly more solid feel to it but is solidly on the 'No Frills" side. Believe it or not in the 10 years we've owned the Clipper we've only sailed it 10 or 12 times. (Overshadowed by bigger boats.) We took it out on the bay last summer after another good clean-up on a reasonably windy day (like most every day on Barnegat Bay) and had a great sail. It responds well to trim and traveler. Even at 15 to 20 knots of wind my wife had no trouble steering. Mine has none of the bilster or bulkhead problems discussed previously, but the boat has been dyr sailed it's whole life. Story has it the previous, first owner hauled it with a Corvette. Just for fun I'm posting an ad from Yachting magazine, July 1971.  

Attachments

2004111194720.96.jpg

Another photo post This ad for Macgregor was on the other side of the page from the Clipper ad in the July 1971 Yachting magazine.  

Rip Edmundson

Loved and sailed our CM26 for 15 years We owned a CM26 Flush-Deck from 1985 to 2000. We loved it and sailed it on Lake Michigan out of Milwaukee. You know it was designed by W.E.B.Crealock the designer of the Pacific Seacraft. There were many nice features on the boat and it was very solid. We took it out in some really hairy weather. The Clipper Marine web site (one of several) is: http://www.scbiz.net/jcox/acm/  

CLM 26 Hull # 550 Tim, I don't know how much you know about the clipper marine. It was designed by W.I.Bill Crealock who now designs for Pacific Seacraft. He designed this series of boats for offshore sailing. He is considered to be one of the fathers of blue-water offshore cruising. The clippers have an average capsize rating of about 1.62 for 15 Crealock designs. The boats were originally produced in Sausalito Ca. Then moved to Santa Ana in 72 or 73. The last 4 digits of the hull number tell you the month and year of manufacture. All the clippers with the exception of the Crealock 37 were from the original CLM 21's design. The 21 was the first design. I have CLM 26 #550 built Oct.73. I am having to replace the interior from years of neglect and have yet to find any delamination or blistering. If you enjoy working on boats the CLM's are worth the fix and Creakock is a great designer. Best of luck, Butch  

Have sail a CM32 for 15 years I have sailed extensively in the Channel Islands for about 15 years in my ’76 Clipper Marine 32 Aft Cabin Ketch. She has been an excellent boat for the price, handling all sorts of weather well. No blister problems at all on the hull (minor on the ruder). The keel is made of steel and has serious corrosion problems, however. The previous owner did not keep the zincs up and I have had to keep a close eye on it. Other than that, sails great, although she does not point very high and is rather sluggish, but makes up for it in being fairly rugged and stable (good for single-handed sailing).  

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CLIPPER MARINE 21 Detailed Review

https://images.harbormoor.com/originals/23fe75ee-d9c2-4e70-9fb9-836c872007dd

If you are a boat enthusiast looking to get more information on specs, built, make, etc. of different boats, then here is a complete review of CLIPPER MARINE 21. Built by Clipper Marine and designed by William Crealock, the boat was first built in 1971. It has a hull type of Swing Keel and LOA is 6.36. Its sail area/displacement ratio 20.81. Its auxiliary power tank, manufactured by undefined, runs on undefined.

CLIPPER MARINE 21 has retained its value as a result of superior building, a solid reputation, and a devoted owner base. Read on to find out more about CLIPPER MARINE 21 and decide if it is a fit for your boating needs.

Boat Information

Boat specifications, sail boat calculation, rig and sail specs, contributions, who designed the clipper marine 21.

CLIPPER MARINE 21 was designed by William Crealock.

Who builds CLIPPER MARINE 21?

CLIPPER MARINE 21 is built by Clipper Marine.

When was CLIPPER MARINE 21 first built?

CLIPPER MARINE 21 was first built in 1971.

How long is CLIPPER MARINE 21?

CLIPPER MARINE 21 is 5.08 m in length.

What is mast height on CLIPPER MARINE 21?

CLIPPER MARINE 21 has a mast height of 6.5 m.

Member Boats at HarborMoor

Clipper marine 21

The clipper marine 21 is a 20.87ft fractional sloop designed by william crealock and built in fiberglass by clipper marine between 1971 and 1977..

The Clipper marine 21 is a light sailboat which is a high performer. It is reasonably stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.

Clipper marine 21 sailboat under sail

Clipper marine 21 for sale elsewhere on the web:

clipper 21 sailboat

Main features

Model Clipper marine 21
Length 20.87 ft
Beam 7.25 ft
Draft 0.54 ft
Country United states (North America)
Estimated price $ 0 ??

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clipper 21 sailboat

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Sail area / displ. 20.81
Ballast / displ. 22.78 %
Displ. / length 173.47
Comfort ratio 11.08
Capsize 2.39
Hull type Monohull swing keel
Construction Fiberglass
Waterline length 16.67 ft
Maximum draft 4.33 ft
Displacement 1800 lbs
Ballast 410 lbs
Hull speed 5.47 knots

clipper 21 sailboat

We help you build your own hydraulic steering system - Lecomble & Schmitt

Rigging Fractional Sloop
Sail area (100%) 192 sq.ft
Air draft 0 ft ??
Sail area fore 96.38 sq.ft
Sail area main 95.99 sq.ft
I 21.78 ft
J 8.85 ft
P 21.33 ft
E 9 ft
Nb engines 1
Total power 0 HP
Fuel capacity 0 gals

Accommodations

Water capacity 0 gals
Headroom 0 ft
Nb of cabins 0
Nb of berths 0
Nb heads 0

Builder data

Builder Clipper Marine
Designer William Crealock
First built 1971
Last built 1977
Number built 0 ??

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  2. 1972 Clipper Marine USA Clipper Marine 21 sailboat for sale in Florida

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COMMENTS

  1. CLIPPER MARINE 21 - sailboatdata

    Designed to determine if a boat has blue water capability. The CSF compares beam with displacement since excess beam contributes to capsize and heavy displacement reduces capsize vulnerability. The boat is better suited for ocean passages (vs coastal cruising) if the result of the calculation is 2.0 or less.

  2. Clipper 21 - Wikipedia

    The Clipper 21, also called the Clipper Marine 21 and the Clipper Mark 21, is an American trailerable sailboat that was designed by William Crealock and first built in 1971.

  3. Clipper Marine 21 — Sailboat Guide

    Clipper Marine 21 is a 20′ 10″ / 6.4 m monohull sailboat designed by William Crealock and built by Clipper Marine between 1971 and 1977.

  4. Did Clipper Marine make a quality sailboat?

    I'm thinking of buying a 1983 21' Clipper Marine sailboat but am unable to get much feedback on the quality of construction. I enjoy restoring sailboats but I do not want to start with junk. Any advice?

  5. CLIPPER MARINE 21: Reviews, Specifications, Built, Engine ...

    CLIPPER MARINE 21 has retained its value as a result of superior building, a solid reputation, and a devoted owner base. Read on to find out more about CLIPPER MARINE 21 and decide if it is a fit for your boating needs.

  6. Clipper Marine 21 1972 Parts/Resources | SailNet Community

    Hello... I am now the proud owner of a fixer Clipper Marine 21. I am new at sailing and fixing up sailboats. I am not intimidated by the rehab project. I just need to know where the best place to go for parts/resources/tips is... Any help and ideas would be great.

  7. Clipper marine 21 - sailboat data sheet

    The Clipper marine 21 is a 20.87ft fractional sloop designed by William Crealock and built in fiberglass by Clipper Marine between 1971 and 1977. The Clipper marine 21 is a light sailboat which is a high performer.

  8. Clipper Marine | Sailboatdata.com

    Clipper Marine. California (USA) builder of a line of trailerable sailboats from 20 to 32', all designed by William Crealock. No longer in business.

  9. 1972 Clipper Marine USA Clipper Marine 21 sailboat for sale ...

    1972 Clipper Marine 21. -the easiest trailer-able weekender! -fully retractable centerboard leaves just 11 inches of draft. -planing-style hull will seriously take off with weather and is extraordinarily stable. -aluminum mast is light enough for one person to step.

  10. Clipper 21 - Wikiwand

    The Clipper 21, also called the Clipper Marine 21 and the Clipper Mark 21, is an American trailerable sailboat that was designed by William Crealock and first built in 1971.